We can’t. It’s over. Laws don’t mean anything anymore. Even if we had a full democratic congress, they would just be ignored. The Trump administration has already been grooming people to accept congress is useless, beginning with the month long shutdown. And the Supreme Courts will just go along with whatever the president wants now.
The only thing congress can do is impeach and convict trump and his administration, thereby stripping him of his authority. Laws have been passed, judges have ruled, but all those are ignored. however, if he has no authority, then we get to find out who's on the side of the constitution and who is with trump and his allies.
There will be many loyalists who will just side with the Trump administration. And then what?
Turns out, when the law has failed, the only solution is a fight to the death. And after such a fight, we do not return to our normal state and live happily ever after, we remain deeply unstable and untrustworthy for decades to come.
If the Senate convicted, things would change. For one thing, I'm confident the military would not consider an impeached and convicted president as its commander in chief. And the prospect of the consequences of continuing to side with such a one would largely evaporate the availability of the administrative apparatus. Civil war would be a possible result, sure. But I disagree that such a Congress would simply be ignored and that ignoring it could be done while maintaining the means of continuing power.
This is catastrophizing, not analysis. If you genuinely feel this hopeless, that's worth examining as a signal about your own mental state rather than treating it as political insight.
Start preparing for the post-American world.